I designed the Pi Beanie pattern to give as a gift to my boyfriend. This seamless beanie is knitted in one piece from the bottom up and features T8F cables modified to create a continuous, spiralling infinity look.

SIZE GUIDE
Child (S) M (L)
Finished measurements:
head circumference 38 (42), 46 (50) cm.

With a recommended negative ease of 15 cm. For example: if your head circumference measures 56 cm, the closest size with the recommended negative ease is size S (the second one).

You can also choose from two different lengths for your beanie:
Above-the-ear length (shorter than a normal beanie) about 14 (18) 18 (19) cm
Ear length (normal beanie length) about 17 (21) 21 (22) cm

The red beanie seen in pictures is size S Above the Ear lenght being worn on a model with 57cm head cricumference. Whilst brick beanie is Size S Ear Lenght and black beanie is size M Ear Lenght - on same model.

YARN
2 balls of Peruvian by Filcolana 50g = 100m (1,76 oz = 110 yd) - estimated for ear lengh.

You can use any similar yarn. Just be sure to meet the gauge. Yarns with cotton in its composition are not recommended for they will stretch.

NEEDLES & OTHER
A pair of 5 mm (US 8) needles with 60 cm (24 in) cables, 1 cable needle; an auxiliary circular needle any size smaller than 5mm (US8); waste yarn; 1 stitch marker; a tapestry needle to weave in the ends.

GAUGE
1sts and 26rounds in 10x10cm. Knitted in 2x2 circular rib, after blocking

You might need to change the size of your needles in order to meet the gauge.

TECHNIQUES
Provisional Cast On
Folded Hem
Modified T8F Cables